Urticarial dermatitis: a nosological dilemma

A persistent dermal hypersensitivity reaction associated with Helicobacter pylori infection

“…3 The term urticarial dermatitis (UD) has been proposed by some as a subset of DHRs with shared features. 4 In the strict definition outlined by Kossard et al 5 in 2006, UD was described as pruritic, erythematous papules and plaques resembling urticaria but lasting longer than 24 hours and sometimes accompanied by eczematous lesions. Although the dermatopathologic correlate to UD is a dermalpredominate hypersensitivity reaction, the precise histologic criteria delineating UD from a DHR continue to be somewhat controversial in the dermatologic literature.…”

“…Although the dermatopathologic correlate to UD is a dermalpredominate hypersensitivity reaction, the precise histologic criteria delineating UD from a DHR continue to be somewhat controversial in the dermatologic literature. [4][5][6] As a result, the term UD may not be a universally accepted diagnostic entity at this time. Thus, we chose to classify the eruption as a DHR despite the fact that presentation may largely fit within the category of UD by Kossard et al's definition.…”

Differential Diagnosis of Urticarial Lesions

“…Urticarial dermatitis occurs mostly in elderly patients and presents with highly pruritic eczematous and urticarial lesions, simultaneously or sequentially. It is difficult to treat and may be idiopathic or represent the initial presentation of several skin diseases, namely bullous pemphigoid or drug eruptions ( 13 – 15 ). All these clinical entities can also present as recurrent dermatosis and participate in the differential diagnosis of both acute and chronic urticarial lesions.…”